Timepiece.



A. STEWART.

TIMEPIECE. APPLICATION FILED APR-2Q. I918.

Patented July 15, 1919.

' reaches.

TE ATES PATENT- orricn 'ANGUS srnwm'r, or nnomn, i'nnno. 1

rmnrmcn i To all whom it may concern Be it known that I, ANGUS STEWART, a

' citizen of the United States, residing at Jerome, in the county of Lincoln and State of Idaho, have invented certain new and useful Improvements in Timepieces of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improve ments in time pieces and has relation more particularly to watches and itis' an object of the invention to provide a novel and improved balanced staff and mounting therefor and whereby undue shock to which the staff may be subjected is *absorbed in a manner to prevent breaking of the pivots or jewels as, embodied in a structure of this par-- ticular character.

An additional objectof the invention is to provide-a novel and improved balance staff wherein thestafi is provided with a resilient or yielding pivot-whereby the staff is -permitted to have lateral movement when subjected to shock and wherein the setting of a coacting jewel for the staff serves to control the extent of lateral or vibratory movement of the staff. v i v Furthermore, it is an object of the inven.

tion to provide a novel and improved mount- 7 ing for a balance staff and wherein the coacting bearin s or jewels are supported for yielding of v1 ratory movement in a direc tion longitudinally of the staff in order to absorb abnormal shock which maybe im v posed upon the staff.

p The invention consists in the details of constructlon and in the combination and arrangement of the several parts' ofmy 1mproved time piece whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for' use, as will be hereinafter more fully set forth. v i The novel features of my invention will 2 hereinafter be definitely claimed.

In order that my invention maybe the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

v Figure 1 is a fragmentary view partly in 7 section and partly in elevation illustrating a balance sta and mounting therefore con? structed in accordance wlth an embodlment Specification of Letters Patent.

Fig. is a fragmentary view partly'in section and partly in elevation illustrating types or styles. The supporting members 1 and 2 are each provided with an opening 3 generally in use except that the central portion thereof is provided with an extension 6 disposed beyond the inner face of the suport.

P B denotes a balance staff of a conventional type except that the opposite end portions thereof are straight or cylindrical as" indithe coactin'g'portion 7 of-the staff B so that the staff} is capable of limited lateral vibration.

The opposite ends of the staff B are provided with the elongated resilient pivots 9 which are engaged in a conventional man- Patented July 15, 1919.' Application med Apr-i120,1918.' Serial no; 229,748.

'in which is mounted a setting 4: for the pivot I jewel 5, The'setting 4is of a type now cated at 7 and which portions 7 are arranged within the extended portions 6 of the setting ner with the jewels 5 and which pivots normally position the staflB centered with relation tothe bores-8 of the settings fl. The resiliency of the pivots 9- permit vibratlon of the stafi B when the watch is subjected to abnormal shocliwhich may be created by the dropping of thewatch or from any other cause. B serves to prevent breaking of the pivots 9 or of the jewels 5. Itwill also be selfevident that the. staff B is held against excessive vibration by contact of the portions 7 thereof with the'walls of the bores 8. Also positioned vwithin the openings 3 are the cap jewels llwhich coactw th the stafi' B or more particularly the pivots 9 thereof in a well known manner. I

In the embodiment of my inventionas disclosed in Fig. 2 of the; accompa'nymg drawings the jewel settin s 4*, are inserted Within the openings 2) o the supports 1 and 2 from the inner side of the supports. 7

The staff B. is-provided with the pivots 9* coacting with'the settings 4: in the same This vibration at the staff manner as has been set forth with reference my invention in practice except as herein- 30 to the staff B.

The outer margin of each of the openings 3 is defined by an inwardly directed flange 12 which overlies the outer face of the setting 14 for the cap jewel15. Interposed between the setting 14 and the flange .12 is an expansible member 16 which constantly urges the setting 14 toward the setting 4 but permitting outward yielding movement of the setting 14 when the staff B is subjected to abnormal shock. When the stafl B is subjected to abnormal shock the same may have limited yielding longitudinal movement together with a lateral vibration as afforded by the pivots 9*.

From the foregoing description, it is thought to be obvious that a time piece constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated and it will be obvious that my invention is susceptable of some change and modification without departing from the principles and spirit thereof and for this reason I do not Wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out after claimed.

I claim:

In combination with a support provided with an opening therethrough, the outer margin of the opening being defined byan inwardly directed flange, a' setting removably arranged Within the opposite end portion of the opening, avsecond setting loosely mounted within the opening between the first named setting and the inwardly directed flange, a coil springinterposed between the marginal portion of the second setting and the inwardly directed flange for constantly urging the second named setting toward the first named setting and permitting a yielding movement of the second named setting, said spring and second setting being housed within the opening, and a balance staif having anend portion mounted within the first named setting and contacting with the secondsetting.

In testimony whereof I hereunto aflixmy signature in the presence of two witnesses.

ANGUS TEWART. Witnesses:

R. H. TRAILL, GEO. R. Hoosrrnm; 

